ماذا تصنع سبع ثواني في عالم الاتصالات
Post on 14-Jul-2015
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GSM
GSM
GSM Global System for Mobile Communication
( ).
• Capacity • Compatibility • Cost • Quality• Security
Digital Vs Analog
GSM
• The Mobile Station (MS). • The Base Station Subsystem (BSS).
• The Network and Switching Subsystem (NSS).
• The Operation and Support Subsystem (OSS).
• :-1.
2. sim card
Base Station Subsystem BSS
1.Base Transceiver Station BTS.2.Base Station Controler BSC3.Transcoding and Rate Adaptation Unit
TRAU
Base Station Subsystem BSS
Base Station Controler BSC
Base Station Controler BSC
Base Station Controler BSC
The Mobile service Switching Center MSC
MSC
HLR Home Location Register
Visitor Location Register VLR
AUC
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